Piston-pump.



M. ANDRES.

PISTON PUMP.

APPLIOATION FILED AUG. 29, 1912 Patented Sept 29, 1914.

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PISTON PUMP.

APPLICATION nun) Amaze, 1912.

1 1 1 2, 1 87 Patented Sept 29, 1914.

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PISTON PUMP.

APPLICATION FILED AUG.Z9, 1912.

1 1 1 2, 1 87, Patented Sept. 29, 1914.

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M. ANDRES. PISTON PUMP.

APPLICATION FILED AUG. 29, 1912.

1, 1 1 2, 1 87'. Patented Sept. 29, 1914.

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. through the outlet pipe, and, 'more particu- UNITED srArnsrArrE r OFFICE.

H MATTIE ANDRES, or s'r. LOUIS, MISSOURI.

PISTON-PUMP.

1,112,187. Specification of Letters Patent.

Patented Sept. 29, 1914. Application filed August 29, 1912.

Serial No. 717,654.

12 fastened to a ceiling 13 or other support. Said rope 10 passes over a pair of pulleys 1 1, one of said pulleys being secured to said ceiling and the other being attached to a weight 15, which holds said rope in tension and causes drum 11 to rotate in one direction. A pawl 16is pivoted at 17 to gear 7 andis held in engagement with a ratchet 18 by means of a spring 19, said ratchet being secured to drumv 11 so as to rotate therewith. By this arrangement, when the 10 causes drum 11 to rotate,-ratchet 18 rotates with said drum and thereby causes gear 7 to rotate through the medium of pawl 16, with the result that said gear 7, in turn, -rotates gears 6 and shafts 3. A bracket 20 is secured to one of the standards 5 and is arranged to form a bearing for drum 11. I The outer end of drum 11 projects from said bracket, in order to allow a crank handle (not shown) to be attached thereto "forthe purpose of rotating same in the reverse direction, whenever it is necessary to rewind ro-pelOon drum 11 after weight 15 pulls said rope to such extent that sameis nearly unwound from said drum.

The barrels may be arranged in a group or set or a plurality of groups or sets of any number of barrels to each group or set, but for the purpose of illustration the barrels 1 of the. pump depicted in the drawings are arranged in two groups or sets, each of which comprises three barrels 1, which may be suspended from a'member 21 boltedor otherwise secured to standards 5, as hereinafter described, or may be supported .in any other suitable manner. Each barrel 1 is preferably disposed substantially vertical, and comprises upper and lower; halves 22, said halves being preferably formed sym metrically so asto be interchangeable and having annular flanges 23 on their adjoins ing edges, which flanges are secured together by bolts 24 or other suitable means. Each half 22 of barrel 1 is'hollow and is preferably formedwith theconfiguration of a frustum of a cone, its smaller end being closed and its larger end being open and bearing an annular flange 23, so that, when twohalves 22 are bolted together to form a To all whom it may concern.-

Be it known that I, MA'r'rm ANDRES, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Piston-Pumps, of which the following is a specification. i

This invention relates to multi-cylinder piston pumps, and contemplates, generally, the provision of an improved pump of that character designed primarily forsupplying a current of air for gasfgenerators and other devices requiring same.

The features of novelty relate toand reside in the construction of the pump and in the connections between the drive shaft or shafts and the pistons so that a continuous non-pulsating current of air will be forced larly, in the use of flexible diaphragms or partitions in connection with the pistons, in order to produce an air. current having a constant and substantially uniform pressure. In the accompanying drawings forming part of this specification, in which like numbers of reference denote like parts wherever they occur, Figure 1 is an end elevation of I a multi-cylinder piston pump embodying. the present invention; Fig. 2 is a topplan view of same; Fig. 3 is a side elevation of same; Fig. 4 is a sectional view. on anenlarged scale, on the line M, Fig. 3; and Fig. 5 is a similar sectional view showing an alternate form of cylinder.

The pump illustrated in the drawingsis of the double-acting type and consists ofa plurality of barrels or cylinders 1. wherein the pistons 2 reciprocate, and an operating shaft 3 or a plurality of such shafts with which said pistons are connected, as hereinafter described. Each shaft 3 is journaled in suitable journal-boxes 4, which are secured to standards 5 by any suitable means, and has a gear 6 rigidly mounted thereon, each gear 6 meshing with and being driven by a gear 7 rigidly mounted on drive shaft 8, which is journaled in suitable journal-boxes 9 secured to standards 5. A rope 10 is wound on a drum 11 that is loosely mount ed. on drive shaft 8, and passes over a sheave pull of rope barrel 1, as hereinabove described. said barrel will be largerthrough its middle than at its ends. The closed end of each half 22 has a central opening 25, which is preferably screwthreaded, the opening in the upper half 22 receiving a screw-threaded boss 26. borne by the lower side of a member 21, and the opening 25 in the lower half'QQ being closedby a screw-threaded plug or cap. 27. The boss 26 supports the barrel 1 and contains. an .openingwhich extends through the member 21 and,"also', through another screwthreaded boss 28 on the upper side of said member, in order to allow the piston-rod 29 to extendrtherethrough and,.also, to afi'ord a' guide for: said=piston-rod A cap3O on boss 28 contains an .opening'through which piston-rod '29 extends, andholds packing 31 around said pistonsrodi in order to prevent leakage of the air from said barrel.-

A boss 32borne by the-closed end of each half- .22: contains a screw threade'd opening in which :a; bushing 33 is screwed The innen end'of bush-.ing-:33 has an inwardly projectingannularflange 34, whichforms the walls ot= an opening"35, said-opening communicating with zthe'interior" of half 22 'and said flange 34 forming the seat" for an inlet V2tlV6v'36 located on one side'thereof and, also, a stop for a member37located on the other side thereof; which @member fits in" the bushing 33; Said membeuii'? contains an opening throughwhich the stem borne by '-valve -36'*is adapted'to slide and, also,

an.orificer39"- or a plurality of such orifices topermit-theingress of'air into the barrel 1; when the valve 36 is unseated: Said valve 36"isa'dapted to open' inwardly by the suction stroke'ot piston2 and is normally held in engagement with its seat 34* by a spring 40,- which is preferably coiled around the evalve stem 38so as to press against'member :37 and, also, against a nut 41 borne by saidstenr. The-casing 42 of an outlet valve 4'8 is secured 'to a boss Me'borne by the closedend othalfQQ, said'boss l l'having an opening145, which communicates with the interior ozt'said half and, also, withthe interior of said valve-casing, in order to permit-theegres's ofiairfrom the barrel 1, whensa1d valve 43' isun'seated. Said outlet valve43 may be a check' valve of any ordinary construction,

an: angle-check valve being depicted in the drawings for the purpose of illustration. A; partition 45' in casing 42 contains an openin'g' l toipermit'the' egress of air therethrough" forms 'a seat for the valve 43',

which is=hinged=at'l8andis normally held 1H2 engagement witlrsaid seat by means- 0f aspring a9. Anopening 50in casing 42" at tords access to the interior andz'is cl-osedby'a removableplug or cap 51'.

, The ,casingQP of the outlet valves 43 at then-upperends of-each: barrel- 1 ofone group of said casing are communicatively connected to a pipe 52, and the casings 42 of the outlet valves 4:8 at the upper ends of each barrel 1 of the other group are, in like manner, connected to another. pipe 52, the casings l2 of the outlet valves 43 at the lower ends of each barrel 1 of both groups being connected to a pipe 53. Both of the pipes 52 and pipe 53 are connected to an outlet or discharge pipe M by means of a four-way T 55 or other suitable connection, said outlet pipe leading to a carbureter or other apparatus (not shown).

Each piston 2 consists of two disk-shaped members 56 which are connected by bolts 57 or other suitable means. The reduced end 58' of piston-rod 29 extends through a central opening in each member and'bears {11,1111t59, which holds said members on said reduced end. A flexible diaphragm or partition 60 of leather, rubber, or any other suitable non-porous fabric has its peripheral edge secured between the flanges 23 of halves QZandits-middlepart secured between the members 56 of piston 2, and thereby separa-testhe interior of barrel 1 into two noncommunicating compartments. The diaphragm 60 works with piston 2 in barrel 1, and, in order to prevent the edges otmcmb'ers 56 from cutting said. diaphragm, each member 56 has its peripheral edge formed into afiange 61, the flange (51 on the upper member 56 being'turned upwardly and the flange (51 011 thelower member 56 being turned downwardly. During each upward stroke ofpiston 2, the upper outlet valve 43 opens automatically and thereby allows the airin'the upper part of the barrel 1 to dischargethrough thepipe 52 into the outlet pipe 54, and the lower inlet valve 36, also, op'ensautomatically and thereby permits the ingress'of air into the lower part of said barrel, and during each downward stroke of piston 2, the lower outlet valve 43 opens automatically and thereby allows the air in the lower part of barrel 1 to discharge through pipe 53into the outlet pipe 5 and the upper inlet valve 36, also, opens automatically andthereby permitsthe ingress of air into the upper part of said barrel. It will be ,seen, therefore, that each stroke'o'f piston l2 exercises 'b'oth'a suction and a discharge influence, 2'. 6., a suction and a discharge ,stroke, air being drawn into one end of bar- Erel 1' at the same-time that the air in the lother end of said barrel is being expelled @therefrom. As the result, it will be apparent-that during each stroke of each pis 'ton there is a discharge of air into the outlet pipe 54. By reason of using the flexible diaphragm 60 in connection with piston 2, an air current-having a constant and substantiallyuniform pressure can be obtained by a'relativelyslowanovement of said piston.

The several pistons 2 are individually connected with the operating shafts 3, as

heremabove stated, the pistons of one group of barrels being connectedwith one of said shafts and the pistons of the other group of barrels being connected with the other of said shafts, and each of said shafts being provided with a separate crank 62 for each piston of its particular group of barrels. The upper end of each piston-rod 29 is preferably screw-threaded and has a member 63 secured thereto, said member being pivotally attached in a fork 64 formed on the lower end of a pitman 65, a pin 66 being passed through registering apertures in the fork prongs and said member, and the upper end of said pitman being attached in any usual manner to a crank 62 of a shaft 3. The cranks 62 of each shaft 3 are predeterminedly and accurately spaced apart in angular relation about said shaft, so that the beginning of the stroke of each piston will overlap the end of the stroke of a piston in advance thereof, with the result that there will be no interval between successive strokes.

The the operating shafts 3 to' rotate relatively slow through the medium of drum 11 and gears 7 and 6 and thereby cause the pistons 2 to reciprocate and work the diaphragms 60 in the barrels 1, with the result that a continuous non -pulsating current of air having a constant and substantially uniform pressure will be forced through the outlet pipe 54. Inasmuch as the consumption of the air fluctuates, the speed at which the shafts 3 rotate varies with the rate at which the air is consumed and thereby maintains a constant and substantially uniform pressure of the air current.

In the alternate form of barrel 1 depicted in Fig. 5, same is designed for use in a single-acting pump. The upper half 22 omitted entirely and a hollow member 67 having the same shape is substituted in lieu thereof, said member having an annular flange 68, which is connected to the flange 23 of the lower half 22 by means of bolts 24, and the peripheral edge of the diaphragm 60 being secured between said flanges 68 and 28. The upper inlet and out let valves 36 and 43 are both omitted, and the closed end of said member contains a central screw-threaded opening 69 in which a lower boss 26 borne by member 21 fits, in order to support said barrel 1, the up-- per boss 28 being, also, omitted. An open ing 70 in the closed end of member 67 permits the air to pass into and out of the upper part of barrel 1, when the piston 2 reciprocates in said barrel. In thisform, the upward stroke of piston 2 opens the inlet valve 36 and thereby draws air into the pull of weight 15 on rope 10 causes lower part ofthe barrel 1, and the downward stroke of said piston opens the outlet valve 43 and thereby allows the air in the lower part of said barrel to be expelled through the outlet 7 is somewhatmodified, the upper member 56 being omitted and an inverted bellshaped member 71 being substituted therefor. The lower end of iston-rod 29 fits in an opening 72 in boss 3 borne by member 71 and is secured in said opening by a pin 74 or other suitable means. The lower member 56 is connected to member 71 by bolts 57, and holds the middle part of the diaphragm 60 between same and said member 71. By reason of using an inverted bell-shaped member 71, the circumferential wall of same prevents the diaphragm from being cut, when the piston recipro'catesin the barrel 1.

It should be understood that, While a continuous non-pulsating current of air having a constant and substantially uniform pressure can be obtained from the use of barrels having their pistons, yet, the same result can be obtained if ordinary pistons and cylinders are used and arranged in the manner hereinabove described.

The operation of the pump is believed to be apparent from the foregoing, and, hence, to require no further or. separate description.

I claim:

1.. In a pump, the combination of a barrel having an opening in an end thereof, a flexible partition in said barrel, a reciprocatory piston working in said barrel and connected to said partition for actuating same, and a support having a pair of lugs located on opposite sides thereof, one of said lugs fitting in the opening in said barrel for supporting the latter, there being an opening extending through said lugs and said member for guiding the piston-rod.

2. In a pump, the combination of a barrel having an opening in an end thereof, a flexible partition in said barrel, a reciprocatory piston working in said barrel and connected to said partition for actuating same, a support having a pair of lugs located on opposite sides thereof, one of said lugs fitting in the opening in said barrel for supporting the latter, there being an open ing extending through said lugs and said member for guiding the piston-rod,, and a packing-retaining cap borne by the other of said lugs and having an opening for 'the piston-rod.

3. In combination with end standards, a pair of spaced horizontal members secured at their ends to said standards, said members having apertures therethrough, barrels disposed on the under sides of said members pipe 54. The piston 2 flexible partitions actuated by and having bosses on their upper ends,' erating the piston-rods, and means to conmeans projecting down from the under sides nect the lower ends of the barrels together. 10 of said members to engage said bosses to In testimony whereoi I hereunto afiix my support the barrels from said members, pissignature in the presence of two witnesses. ton-rods extending through said apertures MATTIE ANDRES.

in said members and into the barrels, pis tons in the barrels connected to the pistonrods, means above said members for opll/ itnesses 1 GEORGE G. ANDERSON, XVALTER O. GUnLs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington,".D. G. 

